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In the title compound, C14H14BrNO4, the dihydro­pyridine ring adopts a screw-boat conformation. In the crystal, pairs of N—H[cdots, three dots, centered]O hydrogen bonds link the mol­ecules into inversion R 2 2(10) dimers.

In the title compound, C16H17NO5, the dihydro­pyridine ring adopts a sofa conformation. In the crystal, inter­molecular N—H[cdots, three dots, centered]O hydrogen bonds link the mol­ecules into chains running along the b axis.